Control valve for gaseous-fuel burners



March 1 0, 1925- H. H. DODGE coN'rnoL VALVE FOR GAsEoUs FUEL BURNERS Filed Aug. 2. 1923 A TTORNE Y Cil Patented Mar. 10, 1925.A

umrau sri-Aras HARRY n, DO DGE,r or: serrano, New vomi.

oorrrnonv VALNE nonn eAsEous-FUEL BURNER-s.

Application led August 2, 1923;. Serial No. 655,377.

Tok all' whom t may' cm1-cern:

`Be it known that I, HARRY H2, DODGE,

Gaseous-Fuel Burners, of* which the follow` lng is a full, clear, and: exact descript1'on.` The invention appertains to gaseous fuelr burners and in particular to valves for controlling the supply of fuel to such burners.- The primary obqect of the invention V1S the `provision of a unitary valve .for use with burners employing a plurality of gaseousfuelv elements, so constructed that a constantv proportional flow of fuel is maintained therethrough during manipulation off the valve and inY all open positions thereof. Other objects are: the provision of a` fuel proportionating control valve for gaseous fuel burners :A the provision-in such' a valve. of means for permitting passage therethrough ata plurali-ty of ypoints ofa constantpredeterniined volume of fuel; the provision in sucha valve of means for preventing admixtureof fuel in the valve; the provision in such a valveof` means for adjustable regulation thereof without altering a predetermined proportional passage of fuel therethrough; andsuch otherobject-s asvvill be hereinafter'apparent from the descriptiontto those skilled in the art. e

The invention resides in the details of construction, combination and arrangement of parts, as will be hereinafter more fully described, set forth in the appended claims and illustrated rin the accompanying drawings, in Whichz- ,l

Figure 1 is a longitudinal cross sect-ion through 'a valve constructed in accordance with the invention,

Figure 2 is a section on line 2-2 ofFigurel, and, -v

Figure 3 is a section on lineB- of'Figure 1. Y f

In this preferred embodimentof the invention, the valveV is designed and adapted fory use in connection 4with burners utilizing natural gas and air as its fuel. For a proper combustio-n ofv this mixture, a proportion of one cubic foot of gas to ten cubic feet of air is required, as the general rule. In Figure 1, the invention is illustrated in detail, and comprises a brass or other metal casting 1 having a central longitudinal bore therethrough, reamed to receive a valve stem` 2 therein. At each end of the casting,

the stem 2 projects therebeyond, terminatmg in externally threaded portions 3 slidable through packing sleeves 4 inserted at eachend of the casting. Threaded overthe portions 3 of the valve stem 2,y at each end, are valve openatingl and adjusting' members consistingA ofihand wheels 5', which bear against` the ends of the packing sleeves 4, so thaton rotation of a wheel, by reasonk of its enga-gement with the val-ve stem end, the, stem willV be caused toV move longitudinally7 within the casting. To insure this movement of the valve stem, the castingis provided with akey 6 passed through a wall thereof and engaged in a longitudinal groove. or keyway 7, formed in the body of the stem, whereby rotation of the valve stem is prevented, while allowing free longitudinal rotation thereof.

suitably spaced points, the body of thel cast-lng l is provided with diametrically aligned lateral passages or bores 8 and 9,

communicating with the bore of the casting, and extending through connecting nipples 10V and 11 respectively, formed on the outer face 'of the casting. One nipple 10 is adapted for connection with the air `intake A of the burner B, while the other nipple 11 is similarly adapted for connection with the gas intake conduit G of the burner. Similar nipples 12 and 13 respectively are formed lon the opposite side of the casting for connection with air and gasy conduits (not shown) The valve stem 2 is provided at pointsl corresponding to the distance between the' casting bores S and`9, with transverse passages 14 and 15 corresponding 1n width to VVthe Width of the said casting bores.` These passageslil and' 15 are adapted kto register Y vwith the casting bores 8 and 9- on proper movement of'the valvestem 2, and the volume of flow therethrough is regulated by adjusting the stem to restrict or open the passages as is obvious. The bore 8 and the passage 14E are adapted for the passage of air therethrough, and, as has hereinbefore been stated, by reason of the proportion ten cubic feet of air to one foot of gas necessary` the air passageway is ten times the crosssectional area of the gas passageway, consisting of the bore 9 and the passage 15. Mixture of the air and` gas Within the casting 1 is prevented by the packing of grease, fed from a cup 16 on the casting and communicating with a milled slot 17 in the casting and surrounding the valve stem.

In operation, the operating Wheels 5 are turned to move the valve stem longitudinally Within the casting l to bring more or less of the transverse passages in the stem 2 into registry with the bores of the casting, permitting a regulation of the fuel flow therethrough. By reason of the predetermined proportional arrangement of the pas sageivays, the flow of air and gas Will at all times have a constant proportion, irrespective of the regulation of the burner fiume by the valve. If desired, the valve Wheels may be removed, when the burner is properly adjusted, or locknuts or the like (not shown) applied to the ends of the stem, for maintaining adjustment.

While a preferred embodiment of the control valve has been described and illustrated herein in specific terms and details of construction and arrangement, it is to be understood that various changes in and modifications of the. same may be resorted to Without departing from the spirit of the invention, or the scope of the claims appended hereto. Also it Will be understood that though the invention has beenv described as using natural gas and air, other forms of gases may be employed, the valve being adjustable for all conditions of supply.

Having thus fully described the inven tion, what is claimed, is

l. A valve for mixed gaseous fuel burners comprising a valve body provided with fuel passages, a valve stem longitudinally movable in said body to open and close said valve, means for operating said stem, and means in said stem for proportionating How of fuel through the valve in all open posirtions thereof.

2. A valve for mixed gaseous fuel burners comprising a valve body provided with fuel passages, a valve stem longitudinally movable in said body to open and close said valve, fuel passages in said stem and of relatively proportional dimensions, and means for operating said stem for simultaneous registering of all of said passages.

3. A valve for mixed gaseous fuel burners comprising a valve body provided with separate spaced fuel passages, a valve stein longitudinally movable in said body to open and close said valve, separate spaced fuel passages in said stein and of different dimensions, said passages being proportionate in dimensions to the requisite proportion of fuel mixture, and means for operating said stem for simultaneous registry of said passages.

4L. A valve for mixed gaseous fuel burners comprising a valve body provided with separate fuel passages for each fuel, a valve stem longitudinally movable in said body to open and close said valve and provided with longitudinally spaced passages for registry with said body passages, said pas sages being of different and relatively proportional cross sectional area to correspond With the proportionate mixture of fuel, and means for operating said stem for simultaneous registry of said passages.

5. A valve comprising a body having a. series of spaced ports, a stem longitudinally movable therein to open andclose said valve and having longitudinally spaced passages of different and relatively proportional dimensions, and means: for moving said stem for simultaneous and adjustable registry of each of said stem passages with certain of said valve ports.

6. A valve comprising a tubular bod) having aseries of oppositely aligned spaced ports, a stem longitudinally movable in said body to open and close said valve, means for operating said stem, and means in said stem for permitting a predetermined and constant proportional flow of fuel through said ports in all open positions of said valve.

7. A proportional valve for mixed gaseous fuel burners comprising a tubular body casting provided with longitudinally spaced oppositely aligned ports, a valve stein disposed in said casting against rotation, means for moving said stem longitudinally in the casting to open and close said valve, and fuel passages being provided in said stem in alongitudinally spaced relation to correspond with the spacing of said ports, .aid passages being of different dimensions With the cross sectional area thereof proportionate to the volume of fuel to be passed through each for the fuel mixture.l

HARRY H. DODGE. 

